"""Piano di abbonamento e limiti per feature."""

PLAN_LIMITS = {
    "freemium": {
        "characters_max": 1,
        "posts_per_month": 15,
        "platforms": ["facebook", "instagram"],
        "auto_plans": False,
        "comments_management": False,
        "affiliate_links": False,
        "editorial_calendar_max": 5,
    },
    "pro": {
        "characters_max": None,
        "posts_per_month": None,
        "platforms": ["facebook", "instagram", "youtube", "tiktok"],
        "auto_plans": True,
        "comments_management": True,
        "affiliate_links": True,
        "editorial_calendar_max": None,
    },
}


def get_plan(user) -> dict:
    """Returns the effective plan for a user (checks expiry for pro)."""
    from datetime import datetime
    plan = getattr(user, "subscription_plan", "freemium") or "freemium"
    if plan == "pro":
        expires = getattr(user, "subscription_expires_at", None)
        if expires and expires < datetime.utcnow():
            return PLAN_LIMITS["freemium"]
    return PLAN_LIMITS.get(plan, PLAN_LIMITS["freemium"])


def check_limit(user, feature: str, current_count: int = 0) -> tuple[bool, str]:
    """Returns (allowed, error_message)."""
    limits = get_plan(user)
    limit = limits.get(feature)
    if limit is None:
        return True, ""
    if isinstance(limit, bool):
        if not limit:
            return False, f"Feature '{feature}' non disponibile nel piano Freemium. Passa a Pro."
        return True, ""
    if isinstance(limit, int):
        if current_count >= limit:
            return False, f"Hai raggiunto il limite del piano Freemium ({limit} {feature}). Passa a Pro."
    return True, ""